523520 has 36 divisors (see below), whose sum is σ = 1257060. Its totient is φ = 208896.

The previous prime is 523519. The next prime is 523541. The reversal of 523520 is 25325.

It can be written as a sum of positive squares in 2 ways, for example, as 350464 + 173056 = 592^2 + 416^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076 + ... + 1484.

2⁵²³⁵²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628530).

523520 is an abundant number, since it is smaller than the sum of its proper divisors (733540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523520 is an equidigital number, since it uses as much as digits as its factorization.

523520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 523520 is about 723.5468194941. The cubic root of 523520 is about 80.5955554199.

Adding to 523520 its reverse (25325), we get a palindrome (548845).

The spelling of 523520 in words is "five hundred twenty-three thousand, five hundred twenty".